diff --git a/contrib/src/stc/stc.cpp b/contrib/src/stc/stc.cpp
index d3e43c21a7..efedc9d763 100644
--- a/contrib/src/stc/stc.cpp
+++ b/contrib/src/stc/stc.cpp
@@ -2547,8 +2547,9 @@ bool wxStyledTextCtrl::LoadFile(const wxString& filename)
         if (len > 0)
         {
 #if wxUSE_UNICODE
-            wxMemoryBuffer buffer(len);
+            wxMemoryBuffer buffer(len+1);
             success = (file.Read(buffer.GetData(), len) == len);
+            ((char*)buffer.GetData())[len] = 0;
             contents = wxString(buffer, *wxConvCurrent);
 #else
             wxString buffer;
diff --git a/contrib/src/stc/stc.cpp.in b/contrib/src/stc/stc.cpp.in
index 7459ffa401..473e08d38e 100644
--- a/contrib/src/stc/stc.cpp.in
+++ b/contrib/src/stc/stc.cpp.in
@@ -356,8 +356,9 @@ bool wxStyledTextCtrl::LoadFile(const wxString& filename)
         if (len > 0)
         {
 #if wxUSE_UNICODE
-            wxMemoryBuffer buffer(len);
+            wxMemoryBuffer buffer(len+1);
             success = (file.Read(buffer.GetData(), len) == len);
+            ((char*)buffer.GetData())[len] = 0;
             contents = wxString(buffer, *wxConvCurrent);
 #else
             wxString buffer;
diff --git a/src/stc/stc.cpp b/src/stc/stc.cpp
index d3e43c21a7..efedc9d763 100644
--- a/src/stc/stc.cpp
+++ b/src/stc/stc.cpp
@@ -2547,8 +2547,9 @@ bool wxStyledTextCtrl::LoadFile(const wxString& filename)
         if (len > 0)
         {
 #if wxUSE_UNICODE
-            wxMemoryBuffer buffer(len);
+            wxMemoryBuffer buffer(len+1);
             success = (file.Read(buffer.GetData(), len) == len);
+            ((char*)buffer.GetData())[len] = 0;
             contents = wxString(buffer, *wxConvCurrent);
 #else
             wxString buffer;
diff --git a/src/stc/stc.cpp.in b/src/stc/stc.cpp.in
index 7459ffa401..473e08d38e 100644
--- a/src/stc/stc.cpp.in
+++ b/src/stc/stc.cpp.in
@@ -356,8 +356,9 @@ bool wxStyledTextCtrl::LoadFile(const wxString& filename)
         if (len > 0)
         {
 #if wxUSE_UNICODE
-            wxMemoryBuffer buffer(len);
+            wxMemoryBuffer buffer(len+1);
             success = (file.Read(buffer.GetData(), len) == len);
+            ((char*)buffer.GetData())[len] = 0;
             contents = wxString(buffer, *wxConvCurrent);
 #else
             wxString buffer;